JPH02253316A - Temperature controller - Google Patents

Abstract

PURPOSE:To decrease the number of sensors and to redice the sensor attachment manhour by performing a prescribed computing operation with use of the temperature signal received from only a temperature sensor that is set near a specific position among those temperature control means. CONSTITUTION:A temperature controller contains the heaters H1 - H8 set vertically in an area 1 to undergo the temperature control, a temperature sensor 2 set near a specific heater H8, and a temperature controller 3 which totally controls the heaters H1 - H8. The controller 3 receives the temperature information (temperature signal) received from the sensor 2 and an arithmetic part 32 calculates the difference between the measured temperature and the set one. An output coefficient part 31 multiples the arithmetic result by each output ratio (output coefficient) and applies the multi-point output to each heater H to perform the total control of the temperatures of those heaters H. Thus it is not required to prepare the temperature sensors in number corresponding to the heaters H nor to prepare a controller. As a result, the number of sensors are decreased together with reduction of the sensor attachment manhour.

Description

[Detailed description of the invention] (b) Industrial application field The present invention relates to a multi-point controlled temperature regulator.

(b) Conventional technology In general, multi-point control temperature regulators employ a method in which a plurality of heaters are arranged in a cascade in a temperature-controlled area.
There is a method in which a plurality of heaters are randomly distributed, for example, one heater is placed in the center and other heaters are placed at each corner.

FIG. 3 is an explanatory diagram showing a conventional multi-point control temperature regulator. This multi-point control temperature controller uses a temperature control device (
Temperature controlled area) Multiple heaters H1, H2, H3 in
, H4, H5, H6, H7, and H8 are arranged in a column, and each heater has a temperature sensor S1, S2, S3, S4, S5,
S6, S7, and S8 are arranged respectively. In addition, temperature controllers TCI, Te3, Te3, Te3, Te3, Te
3, Te3, and Te3 are also prepared in the same number as the heaters H, and each controller TC is connected to the corresponding heater H and temperature sensor S, respectively.

For example, while the workpiece (liquid or gaseous fluid, etc.) passes through the temperature-controlled area, each of the heaters H1...H8 arranged in a column heats the workpiece (liquid or gaseous fluid, etc.). This heating information is transmitted to each controller TCI...Te by each temperature sensor 31...S8.
3 is input. Each controller TC controls each heater H by giving an output of -0-1 to each heater H so that the workpiece is discharged from the temperature-controlled area in a state where the workpiece reaches a set temperature.

(C) Problems to be Solved by the Invention In the conventional multi-point control temperature regulator described above, the heater and the temperature sensor are arranged in one-to-one correspondence. Therefore, it is not acceptable that a plurality of temperature sensors are required in the temperature controlled region tIl, and there are disadvantages in that it takes time and effort to attach the temperature sensors, and the product cost increases.

This invention solves the above-mentioned problems by simply placing a single temperature sensor only on a single specified heater.
It is an object of the present invention to provide a temperature regulator that can appropriately control the output to each heater.

(d) Means and operation for solving the problem In order to achieve this object, the temperature regulator of the present invention has the following configuration.

The temperature controller includes a plurality of temperature adjustment means, a temperature sensor disposed only in the vicinity of the temperature adjustment means specified among the plurality of temperature adjustment means, and performs a predetermined calculation in response to a detection signal from the temperature sensor. and an output coefficient section, which is provided corresponding to the temperature adjustment means and which multiplies the output of the calculation section by a preset coefficient and outputs the result to the corresponding temperature adjustment means.

In a temperature regulator having such a configuration, a temperature sensor is disposed only near a single heater among a plurality of temperature regulating means, for example, a heater. Then, when the temperature control system (temperature control device) is formed, this temperature control system is operated,
The temperature state (temperature characteristics) of a plurality of arranged heaters (all heaters) is detected in advance, and the temperature relationship (correlation) with a specific heater arranged with a temperature sensor is confirmed. In other words, check the temperature characteristics of each heater in the temperature control system.

This determines the output ratio (output coefficient) of each heater with respect to the specific heater in which the temperature sensor is arranged.

During temperature control, the temperature control controller uses temperature information (temperature signal) output from the temperature sensor of a specific heater.
The difference between this measured temperature and the set temperature is calculated. Then, in the output coefficient section, this calculation result (output amount of the calculation result)
is multiplied by each output ratio (output coefficient) and outputs to each heater at multiple points. Thereby, the temperature of each heater is controlled comprehensively.

Therefore, the number of temperature sensors and controllers corresponding to the number of heaters as in the prior art is not required, the number of sensors can be reduced, the number of man-hours for installing the sensors can be reduced, and an inexpensive temperature regulator can be provided.

(E) Embodiment FIG. 1 is an explanatory diagram showing a specific embodiment of the multi-point control temperature regulator according to the present invention.

A multi-point control temperature regulator includes a plurality of heaters H (eight heaters) arranged in a column in a temperature controlled area 1, and a single temperature sensor 2 arranged near a specific heater H. , and a temperature control controller 3 that collectively controls each heater H.

In the embodiment, the plurality of heaters H are in the temperature controlled area 1,
8 heaters H (Hl, H2, H3, H4, H5, H6
, Hl, H8) are arranged in a column.

In the embodiment, the temperature sensor 2 selects the last heater H8 (located on the workpiece discharge side) among the heaters H arranged in a column, and is arranged near this heater H8. .

The temperature control controller 3 includes a calculation unit 32 that performs predetermined calculations such as calculating the difference between the set temperature set by the setting device and the manual temperature of the temperature sensor 2, and each heater H1, H
2. Store preset output ratios (constants) corresponding to H3, H4, H5, H6, Hl, and H8, and multiply the calculation result of the calculation unit 32 by the output coefficient to calculate the output ratio for each heater H1, H2, H3.
, H4, H5, H6, Hl, and H8, and an output coefficient section (calculation section) 31 that outputs multi-point outputs, respectively.

Each heater H1, H2, H3, H4, H5, H6, Hl,
The output coefficient corresponding to H8 is determined by operating the temperature control system 1 in advance when forming the temperature control system (temperature control device) 1, and determining the output coefficient for each heater H1, H2, H3, H4, H5, H6, Hl, H.
Check the temperature status in step 8. In other words, the specific heater H8 where the temperature sensor 2 is arranged and each heater H1, H2, H3, H
4. Check the temperature correlation with H5, H6, and Hl.

Each heater H1 in relation to the specific heater H8
, H2, H3, H4, H5, H6, H1, and H8 are determined as output coefficients of 1, H2, H3, H4, H5, H6, H7, and H8.

Furthermore, each heater H1, H2, H3, H4, H5, H6,
Output control for Hl and H8 is performed by calculating the difference between the set temperature set by the setting device and the measured temperature output from temperature sensor 2, and assuming that this calculation result (output amount of the calculation result) is 100, this Multiply −〇− by each output coefficient (constant),
Output to each heater H. For example, the constant of heater H1 is 1.
is 80%, the possible output l of the heater H1 is 01=■×80%.

Below, each heater (H2, H3, H4, H5, H6, Hl
, H8), the output (02-...08) is similarly calculated by each corresponding constant (H2...H
The output is controlled by multiplying by 8).

FIG. 2 is an explanatory diagram showing another embodiment of the multi-point control temperature regulator.

In the previous embodiment, an example was shown in which a plurality of heaters H were arranged in a column, but in this embodiment, five heaters H (Hl, H2, H3, H4, H5) are distributed for the temperature controlled area 1. An example of the arrangement is shown. In other words, the heater H1 is placed in the center of the temperature controlled area 1, and the other heaters H2, H3, H4
, H5 are placed at each corner. The temperature sensor 2 is disposed only at the heater H1 located at the center. In this embodiment, as in the previous embodiment (the embodiment shown in Fig. 1), once the temperature control device (temperature controlled system) 1 is manufactured, each temperature control device 1 is operated. Temperature correlation of heaters H1, H2, H3, H4, H5 (
(temperature characteristics) and set the output coefficient corresponding to each heater H.

In the temperature regulator having such a configuration, the temperature control controller 3 receives temperature information (temperature signal) output from the temperature sensor 2 of the specific heater H8 (Hl in the second embodiment in FIG. 2), and performs this measurement. Calculates the difference between the temperature and the set temperature. Then, the calculation result (output amount of the calculation result) is 100, and each output ratio (output coefficient) Kl corresponding to each heater H is 2.
．． 3. Multiply H5, H6, H7, and H8 to obtain this output.
, 100 2, 100 3, 100 4, 100 5, 100 6, -0-7, 100 8,
Multiple points are output to each heater H. Thereby, the temperature of each heater H is comprehensively controlled.

Therefore, the number of temperature sensors 2 and controllers corresponding to the number of heaters H as in the prior art is not required, the number of sensors can be reduced, the number of man-hours for installing the sensors can be reduced, and an inexpensive temperature regulator can be provided.

In the above embodiment, a case was explained in which a heater was used as a temperature adjustment means, but the present invention is also applicable to a case where a cooling means is used as a temperature adjustment means.

(F) Effects of the Invention In this invention, as described above, a temperature sensor is arranged only in the vicinity of the specified l among the plurality of temperature control means, and a predetermined calculation is performed in the calculation unit based on the temperature signal from this temperature sensor. This calculation result is multiplied by a preset output coefficient corresponding to the four temperature control means, and multiple points are output to each temperature control means. Therefore, a single temperature sensor can be used for multiple temperature control means. All you have to do is place the . Therefore, the number of temperature sensors and the number of installation steps are reduced, and an inexpensive temperature regulator can be provided. In addition, since it only measures the temperature state of a specific temperature control means, it is possible to solve the purpose of the invention, such as solving problems in temperature control due to temperature interference caused by conventional multi-point sensing and in calculating PID tuning. With excellent effect achieved.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a temperature regulator according to an embodiment of the present invention;
FIG. 2 is an explanatory diagram showing another embodiment of the temperature regulator of the present invention, and FIG. 3 is an explanatory diagram showing a conventional temperature regulator. Engineering: Temperature controlled area, 2: Temperature sensor, 3: Temperature control controller, 31: Output coefficient section, 32: Arithmetic section. Patent applicant Tateishi Electric Co., Ltd. Agent
Patent Attorney Shigeru Nakamura Figure 3

Claims (1)

[Claims] (1) A plurality of temperature control means, a temperature sensor disposed only in the vicinity of one temperature control means specified among the plurality of temperature control means, and performing a predetermined calculation upon receiving a detection signal from the temperature sensor. A temperature regulator comprising a calculation section and an output coefficient section provided corresponding to the temperature adjustment means, which multiplies the output of the calculation section by a preset coefficient and outputs the result to the corresponding temperature adjustment means.